Powertrain fault management

Abstract

A computer is programmed to determine an occupancy status of a vehicle based on received sensor data; and adjust a parameter of a powertrain of the vehicle in response to data indicating a critical condition of the powertrain based on the occupancy status. The parameter may be one of engine speed, cylinder deactivation, transmission-shift time, and shift schedule.

What is claimed is: 
     
       1. A system comprising a computer programmed to:
 determine an occupancy status of a vehicle based on received sensor data, wherein the occupancy status is one of an occupied status and an unoccupied status; 
 adjust an engine speed of a powertrain of the vehicle in response to data indicating a critical condition of the powertrain based on the occupancy status, wherein the powertrain is active for the unoccupied status and for the occupied status; and 
 in response to the data indicating the critical condition of the powertrain, increase the engine speed more for the unoccupied status than for the occupied status. 
 
     
     
       2. The system of  claim 1 , wherein the critical condition is a temperature of the powertrain exceeding a temperature threshold. 
     
     
       3. The system of  claim 2 , wherein the computer is further programmed to determine the temperature threshold based on an ambient temperature. 
     
     
       4. A method comprising:
 determining an occupancy status of a vehicle based on received sensor data, wherein the occupancy status is one of an occupied status and an unoccupied status; 
 adjusting an engine speed of a powertrain of the vehicle in response to data indicating a critical condition of the powertrain based on the occupancy status, wherein the powertrain is active for the unoccupied status and for the occupied status; and 
 in response to the data indicating the critical condition of the powertrain, increasing the engine speed more for the unoccupied status than for the occupied status. 
 
     
     
       5. The method of  claim 4 , wherein the critical condition is a temperature of the powertrain exceeding a temperature threshold. 
     
     
       6. The method of  claim 5 , further comprising determining the temperature threshold based on an ambient temperature. 
     
     
       7. A system comprising a computer programmed to:
 determine an occupancy status of a vehicle based on received sensor data; 
 determine a temperature threshold based on an ambient temperature; and 
 adjust a parameter of a powertrain of the vehicle based on the occupancy status in response to data indicating a temperature of the powertrain exceeding the temperature threshold; 
 wherein the parameter is one of an engine speed, cylinder deactivation, transmission-shift time, or threshold to shift of a shift schedule.